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John Wright 2f65dd475c x86: gettimeofday() vDSO: fix segfault when tv == NULL ... According to the gettimeofday(2) manual: If either tv or tz is NULL, the corresponding structure is not set or returned. Since it is legal to give NULL as the tv argument, the code should make sure tv is not NULL before trying to dereference it. This issue manifests itself on x86_64 when vdso=0 is not on the kernel command-line and libc uses the vDSO for gettimeofday() (e.g. glibc >= 2.7). A simple reproducer: #include <stdio.h> #include <sys/time.h> int main(void) { struct timezone tz; gettimeofday(NULL, &tz); return 0; } See http://bugs.debian.org/466491 for more details. [ Impact: fix gettimeofday(NULL, &tz) segfault ] Signed-off-by: John Wright <john.wright@hp.com> Cc: Andi Kleen <ak@suse.de> Cc: John Wright <john.wright@hp.com> LKML-Reference: <1241037121-14805-1-git-send-email-john.wright@hp.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		16 years ago
..
vdso32	…
.gitignore	…
Makefile	x86: no stack protector for vdso	16 years ago
vclock_gettime.c	x86: gettimeofday() vDSO: fix segfault when tv == NULL	16 years ago
vdso-layout.lds.S	…
vdso-note.S	…
vdso.S	…
vdso.lds.S	…
vdso32-setup.c	…
vdso32.S	…
vextern.h	…
vgetcpu.c	…
vma.c	x86, mm: rename TASK_SIZE64 => TASK_SIZE_MAX	16 years ago
vvar.c	…